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Expired European patentEurope

Method for acylating hexakis (arylmethyl) hexaazaisowurtzitane

EP 1024141 B1 · Applicant: Asahi Kasei Chemicals Corporation

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed October 14, 1998 and granted March 24, 2004. A European patent lasts at most 20 years from filing, so its term ended October 14, 2018.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by April 14, 2024.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledOctober 14, 1998
PublishedAugust 2, 2000
GrantedMarch 24, 2004
Term endedOctober 14, 2018
Application numberEP 98947871
Classification (CPC)C07D487/22

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedOct 14, 1998PublishedAug 2, 2000Patent grantedMarch 24, 2004Term endedOct 14, 2018

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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